All Calculators

Calculate your exact age in years, months, and days from your date of birth.

Calculate the exact number of days, weeks, and months between any two dates.

Find out how many days, weeks, and months remain until any future date.

Convert any duration between seconds, minutes, hours, days, and weeks.

Calculate the number of working days between two dates, excluding weekends.

Calculate the growth of an investment using compound interest over time.

Calculate simple interest earned on a principal over a given time.

Find how much to save monthly to reach your savings goal on time.

Calculate monthly EMI, total payment, and total interest for any loan.

Calculate monthly mortgage payment, total cost, and interest paid over the loan.

Calculate monthly car loan payments, total cost, and interest paid.

Calculate how long it takes to pay off a credit card balance and total interest paid.

Calculate return on investment and annualised return from an initial investment.

Calculate the future value of money accounting for inflation over time.

Estimate your retirement savings based on monthly contributions and investment growth.

Find the final price after a percentage discount and how much you save.

Calculate tip, total bill, and split evenly between any number of people.

Add or extract VAT / sales tax from any price with a chosen rate.

Find the number of units needed to cover fixed and variable costs.

Calculate profit or loss, gross margin, and markup from cost and revenue.

Calculate the fuel cost of a trip based on distance, fuel efficiency, and fuel price.

Convert an amount from one currency to another using a given exchange rate.

Calculate your net worth by subtracting total liabilities from total assets.

Calculate your Body Mass Index and find your healthy weight category.

Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation.

Estimate your ideal body weight using the Devine and Robinson formulas.

Find out how long it will take to lose weight at your daily calorie deficit.

Calculate your recommended daily water intake based on weight and activity.

Estimate your pregnancy due date and current week from the last period.

Calculate your maximum heart rate and training zones by age.

Estimate body fat percentage using the US Navy method.

Calculate your recommended daily protein intake based on weight and activity level.

Estimate your one-rep max using the Epley, Brzycki, and Lander formulas.

Calculate running pace per km, estimated finish times for common race distances.

Estimate calories burned during exercise using MET values.

Estimate your VO2 Max from a 1.5 mile run time using the Cooper formula.

Calculate what percentage X is of Y, or find X% of any value.

Calculate the percentage increase or decrease between two values.

Calculate mean, median, mode, range, and sum from a list of numbers.

Solve for any side of a right triangle using the Pythagorean theorem.

Calculate area and perimeter for circle, rectangle, triangle, or square.

Solve ax² + bx + c = 0 and find both real roots using the quadratic formula.

Break any integer into its prime factors and check if it is a prime number.

Calculate base raised to any power, including fractional and negative exponents.

Calculate the factorial of any non-negative integer (n!).

Find the Greatest Common Divisor and Least Common Multiple of two integers.

Simplify ratios and find missing values in proportions.

Simplify any fraction to its lowest terms.

Calculate population and sample standard deviation, variance, and mean.

Calculate probability of an event and its complement from outcomes.

Calculate the Z-score (standard score) of a data point in a distribution.

Calculate the confidence interval for a population mean from sample data.

Calculate the required sample size for a statistically valid survey or study.

Calculate velocity, distance, or time using the basic kinematic equation v = d/t.

Calculate the kinetic energy of any moving object from its mass and velocity.

Calculate force, mass, or acceleration using Newton's second law F = ma.

Calculate the gravitational potential energy of an object at height h (PE = mgh).

Calculate pressure, force, or area using P = F/A.

Solve voltage, current, or resistance using Ohm's Law V = IR.

Calculate electrical power, energy consumption, and running cost.

Calculate wave frequency, wavelength, or wave speed using v = fλ.

Solve for pressure, volume, moles, or temperature using PV = nRT.

Calculate pressure or volume changes using Boyle's Law: P₁V₁ = P₂V₂.

Calculate temperature or volume changes using Charles's Law: V₁/T₁ = V₂/T₂.

Calculate pH from hydrogen ion concentration [H⁺] or from pOH.

Calculate molarity (concentration), moles, or volume of a solution.

Calculate dilution using C₁V₁ = C₂V₂ — solve for any one unknown.

Calculate moles, mass, or molar mass of a substance using n = m/M.

Calculate density, mass, or volume using ρ = m/V.

Calculate the percent yield of a chemical reaction from actual and theoretical yield.

Calculate concentration in parts per million (ppm) for solutions.

Calculate ΔG, ΔH, or ΔS using ΔG = ΔH − TΔS.

Convert length between metres, feet, inches, kilometres, miles, and more.

Convert weight between kilograms, pounds, grams, ounces, and stones.

Convert temperature between Celsius, Fahrenheit, and Kelvin instantly.

Convert speed between km/h, mph, m/s, knots, and Mach number.

Convert volume between litres, millilitres, gallons, cups, and fluid ounces.

Convert data sizes between bytes, KB, MB, GB, and TB.

Convert energy between Joules, calories, kWh, BTU, and more.

Convert pressure between Pascal, Bar, PSI, atm, and mmHg.

Convert area between square metres, square feet, acres, hectares, and more.

Calculate your weighted average grade from multiple assessments.

Calculate your Grade Point Average (GPA) on a 4.0 scale.

Calculate optimal bedtime or wake-up time based on 90-minute sleep cycles.

Calculate your daily calorie needs based on your goal — lose, maintain, or gain weight.

Estimate your monthly electricity bill based on appliance usage.

Calculate how many litres of paint you need to cover a room or surface.

Calculate the volume of concrete needed for a slab, footing, or column.